Granted Patent
Utility
US 4,306,449 · App. 06/146,726
Apparatus for controlling a member
Inventor:
John P. Hoffman
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Dec 5, 1979
Inventor
John P. Hoffman
Assignee (at issue)
Caterpillar Tractor Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.